Flashcards
Rate of reaction, reversible & equilibrium
Cards in this deck (20)
- 1Rate of reaction increases using a catalyst because...a catalyst lowers the activation energy meaning less energy is needed to start a reaction
- 2Rate of reaction increases when temperature is increased because...more energy is supplied to the particles meaning they move faster, meaning there is more chance of collisions
- 3Rate of reaction increases when pressure increases because...particles are pushed closer together so there is more chance of collisions
- 4Rate of reaction increases when surface area is increased because...more surface is exposed so there is more area for a reaction to happen on
- 5Rate of reaction increases when concentration increases because...there are more particles in a fixed space meaning particles are more likely to collide
- 6Rate of reaction equationRate of reaction= amount of product produced ÷ time taken
- 7Rate of reaction isthe time taken for a product to form, or reactants to be used up
- 8Activation energy isthe minimum amount of energy needed for a reaction to start
- 9On a rate of reaction graph, the larger the gradient...the faster the rate of reaction is
- 10On a rate of reaction graph, we know a reaction is finished when...the line levels off/ no more product is being produced over a certain time
- 11On a rate of reaction graph, when we use tangents, we calculate the rate with the equation..rate of reaction using a tangent =
change in y ÷ change in x - 12A reversible reaction is...a reaction where the products of a reaction can react to produce the original reactants
- 13What is equilibrium?The stage in a reversible reaction where the rate of the forward reaction is equal to the rate of the backward reaction
- 14What is Le Chatelier's Principle?When conditions are changed, the reaction will do everything it can to counteract the change (e.g. when temperature increases, the reaction will favour the endothermic reaction so the temp decreases)
- 15Exothermic=temperature is given out so atmosphere heats up but internal cools down
- 16Endothermic=temperature is taken in, so atmosphere cools down but internal heats up
- 17When pressure increases, which side will it favour?The side with fewer moles
- 18When pressure decreases, which side will the reaction favour?The side with more moles
- 19When concentration increases, which side will the reaction favour?The side with more molecules/moles as it is trying to use it up, so more product is created
- 20—
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- AQA Chemistry- Paper 2, Topic 1 Rates, reversible & equilibrium
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- Abi Bayes
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